Larry sounds like you got it under control. As far as the ride back 400 to 500 miles a day is doable. The only thing to be concerned about I would think is your fuel plan. I would suggest setting up what your mileage will be for the first couple of fill ups. Be conservative and fill up early until you can be sure of the MPG. Also verify with the seller what size the tank is 5 or 6 gallons. I expect you will be stopping for gas at 150 miles or less. That means 3 to 4 stops a day. Stay hydrated and keep your energy up. If you feel tired STOP and rest arrive safe.